Recorder.



M. E. LEEDS. RECORDER.

- APPLICATION FILED OOT.23, 1909.

3 SHEETS-SHEET 1.

M :IVVENTOR z BY V 0mm a. 5M ATTORNEY Patented July 26, 1910.

M. E. LEEDS.

RECORDER- APPLIOATION FILED 0012s, 1909.

Patented July 26, 1910.

3 SHEETS-SHEET 2.

INVENTOR ATTORNEY fiamgazzw. a. a, 3M

M. E. LEEDS. RECORDER.

Patented July 26, 1910.

8 SHEETS-SHEET 3.

APPLICATION FILED 00'1.23, 1909.

WITNESSES wz zfizfi BY M Q 6'25;

0 ATTORNEY STATES PATENT OFFICE.

101318 E. LEEDS, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO LEEDS AND nom'nn U]? COMPANY, ACORPORATION OF PENNSYLVANIA.

nnconnnn.

Specification of Letters Patent. Patented July 26, 1910.

I Application filed October 23, 1909. Serial No. 524,132.

To all whom it may 001mm:

Be it known that I MORRIS E. Lnnos, a citizen of the United tates, residing in the city of Philadel hia, county of Philadelphia and State of certain new and useful Improvements in Recorders, of which the following is a specification.

My invention relates to a system of and apparatus for recording physical, electrical chemical, mechanical, or other quantities and their changes of variations.

My invention relates to a system of and apparatus for recording such magnitudes or quantities as they change or vary with time, the magnitudes or quantities being represented electrically, mechanically, or otherwise; and the corresponding electrical, mechanical, or other variations or changes are responded to by a relatively limited movement of a member, such as an indicator or pointer, which is free to move most of the 7 time and is periodically engaged by another member for the purpose of actuating or controlling recording apparatus.

My invention resldes in such a system, but more particularly in such a system wherein the movable member, as the indicator, needle or pointer, controls the periodic provision or closure of a path over which mechanical energy may be transmitted to exercise any suitable control or to actuate any suitable mechanism. I

My invention resides in the combination with means, such as an indicator, needle, or pointer (which moves in response to the change to be recorded, without itself being called upon to do any appreciable amount of work) of mechanical means for doing the work of making a record, or for doing any other work, as for throwing a switch, or operating any electrical control apparatus or for operating any mechanical device, or in fact any translating instrument; and the work so performed may be as great as may be desired. To this end, I provide means controlled by the indicator or pointer, moved in response to a change, for providing a path along which substantial amounts of mechanical energy may be transmitted to do any useful work or to exercise any control that may be desired, the apparatus being so ennsylvania, have invented that the greater the deflection of the pointer or needle the greater will be the time during which the path for transmission of energy is provided or closed.

In a recorder involving my invention, the arrangement is such that the marker is move a short distance only if the change being recorded is small, and the marker is moved greater distances as the changes to be l\ /iecorded are greater. herelhafter described and claimed.

For an illustration of one of the forms my invention may take, reference is to be had to the accompanying drawings, in which:

Figure 1 is an elemental and simple per spective view of apparatus involving my invention. Fig. 2 is a front elevational view of recorder apparatus involving my invention. Fig. 3 is a vertical cross sectional view taken on the line X X of Fig. 2 and looking in the direction of the arrows. Fig. 4 is a fragmentary vertical cross sectional view, partly in section, taken on the line Y-Y, Fig. 2, and looking in the direction of the arrows. Fig. 5 shows three transmission gears in plan. Fig. 6 is a front eleva tional view of one of the control levers. Fig. 7 is a front elevational view of a control lever cooperating with that shown in Fig. 6. Fig. 8 is a detailed view showing shaft mounting.

Referring to Figs. 1, 2, and 3, l is the needle, pointer, or indicator ofany electrical, mechanical, chemical, or other instrument, and is deflectable to the right or left, as viewed in Figs. 1 and 2, in responseto any change to be recorded, or in response to any change which is to exercise any control or actuate any mechanism. For example, it may be the needle or pointer of a galvanometer, an nrnmeter, a voltmeter, a wattmeter, a relay, or in fact any electrical instrument; or. it may be the indicator or pointer of a barometer, a thermometer, a dynamometer, a pressure gage, or, in fact,

any mechanical measuring or indicating in-- strument, or indeed of any instrument whatsoever. Cooperating wlth the needle or pointer 1 are two control levers 2, 2 each having a stepped end 3, here shown as having the three steps 4, 5, and 6 at different elevations. The stepped endsof the two levers 2, 2 are arranged to either side of the zero or normal position of the pointer 1, so that as the pointer deflects either in the one direction or the other it comes directly over one or the other of the steps. Each of the levers 2 is provided with a projection 7 extending upwardly back of the plate 8, the latter held by screws 9 to the frame of the apparatus. These projections 7 form guides for the levers 2 in their movements and may also serve as limiting stops for the needle 1 if itv should make great deflections. Each lever 2 is pivoted at 10 upon the end of lever 11 which is, in turn, pivoted to the frame of the apparatus at 12. To each lever 2 is connected atension spring 13, the other end of which is connected at 14 to the frame of the apparatus. The tension exerted by the springs 13, 13, holds the levers 2, 2 in their normal position as shown.

A continuously rotating shaft 15 is reduced in diameter at its ends and at these points of reduced diameter has bearings 16 in the frame of the apparatus. As seen in Fig. 8, 17 is a part of the frame of the apparatus, 16 is the end of the shaft 15 with reduced diameter, and 18 is a block having a projection 19 entering a slot in the member 17 and bearing against the shaft 16, a spring 20 pressin' the member 18 forward. At one end of the s aft 15 and coaxially therewith, is connected thereto a piece of piano wire 21 which serves as a flexible or resilient driving medium between the driving shaft 22 and the shaft 15, the shaft 22 being continuously rotated by any suitable motor or source of power. Approximate each end of the continuously rotating shaft 15 there is secured by set screw 23 a collar 24 having secured thereto a pin 25. The lower or hooked end 11 of each of the levers 11 extends into the path of travel of the pin- 25,

the effect of the springs 13 being, however, to keep'these ends deflected outwardly.

Two series of incomplete or mutilated gears are secured upon the shaft 15. As here shown, by way of example merely, each series comprises three gears, 26, 27, 28, dis-. posed side by side with separator or guide disks 29 alternating with the gears of the series. These gears are shown in plan in F ig. 5, and as there shown, are incomplete or mutilated. Each has a depression or notch 30 adjacent to the beginning of the teeth. These gears differ as to their number of teeth, as illustrated in Fig. 5. The separator disks 29 are also notched at 30, thenotches registering with the notches 30 in the ears 26, 27, and 28.

A apted to cotiperate with the gears 26, 27 and 28 are the pinions-31, being pivoted on the lower ends 2, 2 of the levers 2, 2. And the pinions 31 .are adapted to engage also the teeth of the gear wheel 32 loosely pivoted upon the shaft 33. Keyed upon the shaft 33 is the spur wheel 34 which is normally locked to the gear wheel 32 by the spring 35, dented at 36 to engage between teeth or spurs of the wheel 34, spring 35 I being pivoted upon the wheel 32. at 37 and engaging the under side of the pin 38, secured in the wheel 32, as viewed in Fig. 2. Driven by the shaft 33, having its bearings at 39 and 40 in the frame of the apparatus, as shown in Fig. 3, is the screw threaded member 41 around and in the threads of which the chain, wire, cord, or other suitable means 42 is wound one or more times. This chain extends to either side of the apparatus,

as shown in Fig. 2, and passes over pulleys or guides 43 and has its ends secured to the carrier member 44, or other translating device which is to be actuated by the power transmitted through the trains of gearing above described. In this case, the carrier 44 supports the marker 45 for tracing a line or curve upon a paper or other moving record sheet which is fed by the spur wheel 46 over the cylindrical surface or guide 47. This carrier -member 44 slides uponthe bar 48. The carrier 44 is held resiliently upon the bar 48 by the spring 49 which is notched at its upper ends, and these notches partially embrace the fixed rod 50, against which the spring 49 exerts pressure topress the carrier 44 downwardly. Supported by the bar 48 and extending longitudinally thereof is the electric conductor 51, and maintaining contact therewith is the contact 52 carried by member 44. The contact moving over the conductor 51 may be used for any purpose to control any electric circuit which shall exercise any control or actuate any device. By way of example merely, it may be stated that the contact 52 and the conductor 51 may be i used, as disclosed in application Serial N o. 47 8,144,'for rebalancing the electric circuit which controls or actuates the instrument (if an electrical instrument) whose pointer or needle is 1, the contact 52 corresponding with contact an and conductor 51 corresponding with conductor W of said application.

The operation of my system and apparatus is as follows: The shaft 15 is continuously rotated by the electric motor or other suitable source of power driving the shaft '22 and the resilient or yielding connectin member 21. At each revolution the curve ends 11 of the levers 11 are engaged by pins 25, thereby tilting the levers 11 upontheir pivots 12 to lift the levers 2. If the needle 1, which is free to move most of the time, has been deflected in response to a change to be recorded, or in response to a change which is to control the actuation of any device, and is sufliciently widely deflected to be engaged by the step 6 of the lever 2. when it is raised, as described, the needle will be held by step 6 against the under side of plate 8 and since the outer end of the lever 2 cannot move farther, be-

ing thus stopped or limited by the needle itself, the continuation of movement of the lever 11 is accompanied by a movement of lever 2 on pivot 10, and the lower end 2 of the lever 2 then carries the pinion 31 outwardly, that is, away from the middle of the apparatus, as viewed in Fig. 2. The levers are so proportioned and the step 6 so pr0 portioned or located that the pinion will be carried only far enough to come into the path of ear 26. To come into this path the pinion flrst comes opposite the notch 30 through which it can freely pass; then as the shaft 15 carries the gear 26 around the pinion 31 is caught by the teeth of the gear 26, meshing therewith, andat the same time deflecting the lower end 2 of the lever 2 toward the right, as viewed in Fig. 3, or inwardly toward the gear 32 until it meshes with gear 32, as' seen in Fig. 4. The gear 26, in consequence, drives, through the medium of pinion 31, the gear 32 in a given direction. Through the dented spring 35 the gear 32 in turn drives the spur wheel 34 and, therefore, the screw threaded member 41 attached thereto through shaft 33. There results then a rotative movement of the member 41, winding up the chain 42 on one side and unwinding it on the other, with resultant movement of the carrier 44 and the marker 45 transversely to the continuously moving record sheet, tracing thereon a mark. This will be the longest mark traced for one revolution of the shaft 15, because the needle has given a great deflection and has caused the selection of the gear 26 which has teetli extending over a larger portion of its periphery than the other gears 27 and 28. If, however, the deflect-ion of the pointer or needle 1 is relatively slight, it comes opposite step 4 on the end of the lever 2, and is then engaged by such step with the resultant greater movement of the lower end 2 of the lever 2 suflicient to bring the pinion 31 into line with or into the path of the short ear 28. The action will be the same as be ore, except that now the carrier 44 will move only a relatively short distance. And, again, if the needle deflect to a position intermediate to the two previously described, the step 5 will engage the needle 1 and the pinion 31 will be brought into line with the intermediate or middle gear 27, causing the carrier 44 to move a distance intermediate the other two distances described. It follows, therefore, that the needle 1 in deflecting controls the transmission of mechanical power to any device to be actuated, here shown as the carrier 44 for a marker of recording apparatus. But more than this, the extent-0f the increment of movement of the device to which the power is transmitted is dependent upon the extent or degree of deflection of the needle 1. If, however, the needle should deflect in an opposite direction from the one 'by pin 25 at 11 assumed above, the action will be the same as that described, except that the wheel 32 and, therefore, the member 41, will be rotated in an opposite direction, with consequent movement of the member 44 in 0pposite direction. If the unbalancing should be so continued that the carrier member 44 reaches the limit of possible travel either to the right or left, as viewed in Fig. 2, the increased tension upon the chain 42 will cause an increased force to be transmitted by wheel 32 through spring 35.to the wheel 34. But this increased force will be suiiicient to cause the dent 36 to ride up over the teeth or spurs of the wheel 34, the spring 35 deflecting upwardly, as viewed in Fig. 2 in such case, and thus unclutching the wheels 32 and 34 from each other with the result that the apparatus cannot be damaged.

As seen from the drawings, the lever 11 is engaged only a relatively short time at ll by the pin 25. The duration of engagement being relatively short, the lever 2 is raised only a relatively short time, so that the movable member 1, when engaged, is engaged only a relatively short time, and is free. to move most of the time. When 11 is engaged by pin 25 and the movable member 1 is engaged'by any of the steps on the end of the lever 2, the pivot 10 is in raised position, and immediately the movable member 1 is disengaged, due to the passage of pin 25 from 11*, the pivot 10 descends, allowing the pinion 31 to descend, until the lever 11 comes to normal position against a stop, not shown. By the engagement of movable member 1, the pinion 31 has been shifted to a position in front of one of the gears 26, 27 or 28, which rotate in a counter-clockwise direction, as viewed in Fig. 5. Due to the lowering movement of the pinion 31, it is in effect moving away from the approaching teeth of the gear. Butafter the pinion has reached its lowermost position the teeth at the beginning of the gear approach and engage the pinion and cause the action heretofore described. During this interval-"bf time, however, the pin 25 has passed beyond 11 and the movable member 1 has become disengaged a ain and free to move. The needle 1, there ore, is disengaged in each case before the pinion meshes with the selected gear. The guides or separated disks 29 serve, once the pimon 31 has been deflected to a certain positlon, to guide the pinion to the teeth on the gear. And after the pinion has traversed the teeth on the gear, will, when it comes again tothe' notch 30 return to or near normal positlon. The needle or pointer 1 may be brought back to balance condition by mechanically winding up a spring in opposition to WhlCh the needle or pointer 1 is deflected or moved under the controlling electric or other force which represents the change to be recorded.

said marker, and mechanical means con trolled by said movable member for transmitting power through said mechanical means.

3. The combination with a member movable in response to a change to be recorded,

- of a marker, a normally incomplete path between 2. source of mechanical power and said marker, and mechanical means controlled by said movable member for closing said path.

4. The combination with a member movable in response to a change to be recorded, of a marker, mechanical means for moving said marker, and means periodically engaging said movable member when deflected for causing ower to be transmitted through said mec anical means. V

5. The combination with a member movable in response to a change to be recorded, of 'a marker, a normally incomplete path between 9. source of mechanical power and said marker, and means controlled by said movable}:1 member for periodically closing said at p 6. The" combination with a member movable in response to a change to be recorded, of a marker, and means controlled by said movable member for moving said marker through different definite distances dependent upon the extent of deflection of said movable member. p

7. The combination with a member movable in response to a change to be recorded,-

of a marker, periodically operated means controlled by said movable member f r' movin said marker, and means contro ed by sa1d movable memberifor causing the movement of said marker through different distances dependent upon the extent of deflection of said movable member.

8. The combination with a member movablein response to a change to be recorded, of a marker, a normally open path between a source of power and sa1d marker, means controlled by said movable member for periodically closing said ath, and means controlled by said movab e member for determining the distance of movement of said marker.

eeaeae 9. The combination with a member movable in response to a change to be recorded,

of a marker, a normally open path between a source of power and sa1d marker, a plurality of means controlled by said movable member for closing said -path for different periods of time, and means for selecting said path closing means in accordance with the extent of deflection of said movable member.

10. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a train of gearing between said source and said marker, a plurality of gears in said train for causing difier ent degrees of movement of said marker, and means controlled by said movable member for selecting a gear in accordance with the extent of deflection of said movable member.

11. The combination with a member movable in response to a change to be recorded, of a marker, a power shaft, aJmember periodically actuated by said shaft, said movable member when deflected engaged by said shaft actuated member, and means for connecting said marker with said shaft to move said marker when said movable member is deflected. I

12. The combination with a member movable in response to a change to be recorded, of a marker, a periodically operated member for engaging said in vable member for causing the movement 0 said marker, said periodically operated member having different degrees of movement dependent upon the extent of deflection of said movable member, and the extent of movement of said marker being dependent upon the degree of movement 0 sai member.

13. The combination with a member movable in response to a change, of a translating device, mechanical means for moving sa1d translating device, and periodically operated means controlled by said movable member for transmitting power through said mechanical means.

14. The combination with a member movable in response to a change, of a translating device, mechanical means for moving said translating device, and means periby said movable member for periodically closing said path.

"16. The combination with a member movable in response to a change, of a translating device, means controlled by said movable member for moving said translating device through different definite distances de endent upon the extent of movement 0 said movable member.

17. The combination with a member movable in response to a change, of a translating device, a normally open path between a source of power and said translating device, a plurality of means controlled by said movable member for closing said path for different periods of time, and means for selecting said path closing means in accordance with the extent of movement of said movable member.

18. The combination with a movable member, of a translating device, a source of power, a train of gearing between said source of power and said translating device, a plurality of gears in said train for causing different degrees of movement of said translating device, and means controlled by said movable member for selecting a gear in accordance with the extent of deflection of said movable member. g

19. The combination with a member movable in response to a change to be recorded, of a marker, a device for moving said marker, and mechanical means throu h which saidmovable member controls said motive devices.

20. The combination with a member movable in response to a change, of a translating device, a source of mechanical power normally disconnected from said translating device, and a periodically operated member controlled by said movable member for coupling said source of power with said translating device.

21. The combination with a member movable in response to a change, of a translating device, a source of mechanical power normally disconnected from said translating device, means for coupling said source of power with said translating device, and a periodically operating member controlled by said movable member for controlling said coupling means. i

22. The combination with a member movable in response to a change, of a translating device, a normally incomplete path between a source of mechanical power and said translating device, path closing means, and aperiodically operating member controlled by said movable member for controlling said path closing means.

23. The combination with a member movable in response to a change, of atranslating device, a source of mechanical power, a periodically operating member adapted to engage said movable member, and coupling means controlled by said periodically operating member for controlling connection between said source of power and said translating device.

24. The combination with a member movable in response to a change, of a'translating device, a source of mechanical power, and a periodically operating member adapted to engage said movable member for controlling controlled member controlled thereby and adapted to engage said movable member, and means controlled by said spring controlled member for connecting said translating device with said source of power.

26. The combination with a member movable in response to a change, of a translating device, a source of mechanical power, a periodically operating lever adapted to en: gage said movable member, and mechanical means controlled by said lever for connecting said source of power with said translating device.

27. The combination with a member movable in response to a change, of a translating device, a source of power, a periodically operating lever, a second lever actuated by said lever and adapted to engage said movable member, and means controlled by said second lever for connecting said source of power with said translating device.

28. The combination with a member movable in response to a change, of a translating device, a source of power, a periodically operating member controlling means for connecting said source of power with said translating device, said periodically operating member adapted to engage said movable member at did'erent points dependent upon the extent of deflection of said 'movable member, whereby said translating device is connected for difierent periods of time with said source of power.

29. The combination with a member movable in response to a change, of a translating device, a source of power, a periodically operating member, means for connecting said translating device with said source of power controlled by said periodically operating member, said periodically operating member adapted to engage said movable member and having difierent degrees of movement dependent upon the extent of de- Election of said movable member.

30. The combination with a member movable in response to a change, of a translating device, a source of power, a periodically operating lever adapted to engage said movable member, a plurality of steps upon said lever, said different steps being engaged according to the extent of deflection of said movable member, and means controlled by said lever for connecting said source of power with said translating device, the period of connection depending upon the extent of deflection of said movable member.

31. The combination with a member movable in response to a change, of a translat ing device, a Source of power, a normally open path between said translating device and said source of power, and means adapted to engage said movable member for closing said path, said means disengaging from said movable member before said path is closed.

32. The combination with a member movable in response to a change, of a translating device, a source of power, a normally open path between said source and said translating device, a path closing member, a guide therefor, and a member controlling said path closing member and adapted to engage said movable member, said member when engaging said movable member shifting said path closing member to said guide. 33. The combination with a member movable in response to a change, of a translating device, a source of power, a normally open path between said source and said translating device, a path closing member, a guide therefor, and a member controlling said path closing member and adapted to engage said movable member, said member when engaging said movable inember shifting said path closing member to said guide, said movable member and said member disengaging from each other before said path is closed.

34. The combination with a member movable in response to a change, of a translating device, a source of mechanical power, a normally open path between said source and said translating device, a periodically operating member adapted to engage said movable member for closing said path, the power transmitted over said path being independent of the force of engagement of said periodically operating member with said movable member.

35. The combination with a member movable in response to a change, of a translating device, a source of power, a plurality of gears intervening between said source of power and said translating device, and a stepped member adapted to engage said movable member for selecting one of said gears for connecting said translating device with said source of power.

36. The combination with a member movable in response to a change, of a translating device, a source of power, a plurality of gears intervening between said source of power and said translating device, and a periodically operating stepped member adapted to engage said movable member for selecting one of said gears for connecting said translating device with said source of power.

37. The combination with a member movable in response to a change, of a translating device, a continuously rotating member, a normally open path between said rotating 'member and said translating device, and a lever periodically'operated by said rotating member and adapted to engage said movable member for closing a path between said rotating member and sa1d translating device.

38. The combination with a member movable in response to a change, of a translating device, a continuously rotating shaft, a normally open path between said shaft and said translating device, and a lever periodic ally operated by said shaft and adapted to engage said movable member for closing a path between said shaft and said translating device.

39. The combination with amember movable in response to a change to be recorded, of a marker, a continuously rotating member, a normally open path between said rotating member and said marker, and a lever periodically operated by said rotating member and adapted to engage said movable member for closing a path between said rotating member and said marker.

40. The combination with a member movable in response to a change to be recorded, of a marker, a continuously rotating shaft, a normally open path between said shaft and said marker, and a lever periodically operated by said shaft and adapted to engage said movable member for closing a path between said shaft and said marker.

41. The combination with a member-movable in response to a change to be recorded, of a marker, a source of mechanical power normally disconnected from said marker, and a periodically operated member controlled by said movable member for coupling said source of power with said marker.

42. The combination with a member movable in response to a change to be recorded, of a marker, a source of mechanical power normally disconnected from said marker, means for coupling said source of power with said marker, and a periodically operatin member controlled by said movable mem er for controlling said coupling means.

43. The combination with amember movable in response to a change to be recorded, of a marker, a normally incomplete path between a source of mechanical power and said marker, path closing means, and a pe riodically operating member controlled by said movable member for controlling said path closing means.

44:. The combination with a member movable in-response to a change to be recorded, of a marker, a source of mechanical power, a periodically operating member adapted to engage said movable member, and coupling means controlled by said eriodically operating member for controlling connection between said source of power and said marker.

45. The combination with a member movable in response to a change to be recorded, of a marker, a source of mechanical power, and a periodically operating member adapted to engage said movable member for controlling connection between said source of power and said marker, the mechanical power transmitted to said marker being independent of the work done upon said movable member.

46. The combination with a member movable in response to a change to be recorded, of a marker, a source of mechanical power, a periodically operating member, a spring controlled member controlled thereby and adapted to engage said movable member, and means controlled by said spring controlled member for connecting said marker with said source of power.

47. The combination with a member movable in response to a change to be recorded, of a marker, a source of mechanical power, a periodically operating lever adapted to engage said movable member, and mechanical means controlled by said lever for connecting said source of power with said marker.

v 48. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a periodically operating lever, a second lever actuated by said lever and adapted to engage said movable member, and means controlled by said second lever for connecting said source of power with said marker. 49. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a period ically operating member controlling means or connecting said source of power with said marker, said periodically operating member adapted to engage said movable member at difierent points dependent upon the extent of deflection of said movable member, whereby said marker is connected for different periods of time with said source of power. 1

50. The combination with a member movable in response to a change to be recorded, of a marker, 2. seurcesot power, aperiodically operating member, means for connecting said marker with said source of power controlled by said periodically operating member, said periodically operating member adapted to engage said movable member and having difl erent degrees of movement dependent upon the extent of deflection of said movable member.

51. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a periodically operating lever adapted to engage said movable member, a plurality of steps upon said lever, said difierent steps being engaged according to the extent of deflection with said source of of said movable member, and means controlled by said lever for connecting said source of power withlsaid marker, the period of connection depending upon the extent of deflection of said movable member.

52. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a normally open path between said marker and said source of power, and means adapted to engage said movable member for closing said path, said member disengaging from said movable member before said path is closed.

53. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a normally open path between said source and said marker, a path closing member, a guide therefor, and a member controlling said path closing member and adapted to engage said movable member, said member when engaging said movable member shifting said path closing member to said guide.

54. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a normally open path between said source and said marker, a path closing member, a guide therefor, and a member controlling said path closing member and adapted to engage said movable member, said member when engaging said movable member shifting said path closing member to said guide, said movable member and said member disengaging from each other before said path is closed.

55. The combination with a member movable in response to a change to be recorded, of a marker, a source of mechanical power, a normally open path between said source and said marker, a periodically operating member adapted to engage said movable member for closing said path, the power transmitted over sa d path being independent of the force of engagement of said periodically operating member with said movable member.

56. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a plurality of gears intervening between said source of power'and said marker, and a stepped member adapted to engage said movable member for selecting one of said gears for connecting said marker with said source of power.

57. The combination with a member movable in response to a change to be recorded, of a marker, a source of power, a plurality of gears intervening between said source of power and said marker, and a periodically operating stepped member adaptedto engage said movable member for selecting one of said gears for connecting said marker ower.

58. The combination with a member moveeaeae able in response to a change, of a translating device, a periodically operating member. co-

operating with said movable member to engage the same to close a path between a source of power and said translating device, said translating device being moved a distance proportional to the extent of said change by increments whose magnitudes are dependent upon the extent of movement of said movable member.

59. The combination with a member movable in response to a change, of a translating device, a -periodically operating member cooperatin with said movable member -to engage t e same to close a path between a source of mechanical power and said translating device, said translatin device being moved a distance proportiona to the extent of said change by increments whose magnitudes are dependent upon the extent of movement of said movable member.

60. In a recorder system, a member movable in response to a change to be recorded, a marker, a periodically operatinginember cooperating with said movable member to engage the same to close a path between a source of power and said marker, said marker being moved a distance proportional to the extent'of said change to be recorded by increments whose magnitudes are dependent upon the extent of movement of said movable member.

61. In a recorder system, a member movable in response to a change .to be recorded, a marker, a periodically operating member codperating with said movable member to engage the same to' close a path between a source of mechanical power and said marker, said marker being moved a distance proportional to the extent of said change to be recorded by increments whose magnitudes are dependent upon the extent of movement of said movable member.

62. The combination with a member movable in response to a change, of a translating device, two periodically operating members adapted to engage said movable member according as said member moves in one direction or another, a source of ower, a gear for drivin said translating evice, a

gear controlled y each of said periodically operating members, said gears adapted to codperate with said translating device driving gear for driving said translating device in difierent directions.

63. In a recorded system, of a member movable'in response to a change, a marker, two periodically operating members adapted to engage said movable member according as said member moves in one direction or another, a source of power, a gear for driving said marker, a gear controlled by each of said periodically operating members, said gears adapted to coiiperate with said marker driving gear for driving said marker in diiferent directions.

64. The combination with a member movable in response to a change, of a periodically operating member for engaging said movable member, a translatlng device, means for moving said translating device a step for each engagement between said members, and means for causing the step movement to be difi'erentfor different movements of said movable member.

65. The combination with a member movable in response to a change, of a periodically operating member for engaging said movable member, a translating device, a source of mechanical power for moving said translating device a step for each engagement between said members, and means for causing the step movement to be difierent for different movements of said movable member.

. 66. In a recording system, the combination with a member movable in response to a change to be recorded, of a periodically operating member for engaging said movable member, a marker, means for moving said marker 9. step for each enga ement between said members, and means or causing the step movement to be different for different movements of said movable member.

67. In a recording system, the combination with a member movable in response to a change to be recorded, of a periodically operating member for engaging said movable member, a marker, a source of mechanical power for moving said marker a step for each engagement between said members, and means for causin the step movement to be difi'erent for di erent movements of said movable member.

In testimony whereof I have hereunto afixed my signature in thepresence of the two subscribing witnesses.

MORRIS E. LEEDS.

Witnesses MAUD SHABPLESS, MARGARET W. UNRUH. 

